CN102803821A

CN102803821A - Illuminating device, display device, and television receiver

Info

Publication number: CN102803821A
Application number: CN2010800253382A
Authority: CN
Inventors: 笠井信宏; 毛利裕一
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2009-06-15
Filing date: 2010-06-04
Publication date: 2012-11-28
Also published as: RU2011150817A; BRPI1013537A2; US20120086888A1; WO2010147005A1; JP5133458B2; JPWO2010147005A1; EP2426398A4; EP2426398A1; RU2502916C2

Abstract

Provided is an illuminating device which provides substantially uniform color tone as a whole. The illuminating device (12) is provided with a plurality of point light sources (17) and a chassis (14) which houses the point light sources (17). The point light sources (17) are classified, in accordance with the color tones thereof, into two or more color tone ranks (A, B, C), each of which forms, on the CIE 1931 coordinates, a rectangle with one side having a coordinate distance of 0.01. The chassis (14) houses the point light sources (17) that belong to different color tone ranks (A, B, C).

Description

Lighting device, display unit and radiovisor

Technical field

The present invention relates to lighting device, display unit and radiovisor.

Background technology

For example, be used for the liquid crystal panel of liquid crystal indicator such as LCD TV because therefore unautogenous light, need backlight arrangement as lighting device in addition.The known dorsal part (side opposite) that is arranged at liquid crystal panel of this backlight arrangement with display surface, and possess a plurality of light sources (for example, LED).

Known formation of carrying White LED at this backlight arrangement, the tone variation even this White LED also mostly occurs in white.Therefore, as the device of the white light that can use White LED irradiation regulation, the device of known patent document 1 record with tone variation.In this device, under the yellow partially situation of the light of White LED, through strengthening the luminous white light that obtains stipulating of blue led.

The prior art document

Patent documentation

Patent documentation 1: the spy opens the 2008-153039 communique

Summary of the invention

The problem that invention will solve

But, in patent documentation 1 disclosed device owing to use two kinds of LED, therefore, manage numerous and diverse, simultaneously, at White LED for example partially under the situation of green, the problem of the white light that existence can not obtain stipulating.In addition, for the white light that obtains stipulating, also can consider the only scheme of the White LED of the white light of selection use this regulation; In this case, owing to can only use confined White LED, therefore; Must superfluously produce White LED, cause that the cost of backlight arrangement improves.

The present invention is based on the problems referred to above and proposes, and its purpose is to provide a kind of roughly lighting device of the illumination light of uniform color tone that can obtain as a whole.In addition, the object of the invention is to provide a kind of radiovisor that has possessed the display unit of such lighting device and possessed such display unit.

The scheme that is used to deal with problems

In order to address the above problem; Lighting device of the present invention is characterised in that; Possess a plurality of point source of lights, take in the base of above-mentioned point source of light; Each above-mentioned point source of light is divided into respectively in the CIE1931 coordinate, to form on one side according to its tone and is the tetragonal tonal gradation more than 2 of coordinate distance 0.01, in above-mentioned base, takes in the above-mentioned point source of light of the above-mentioned tonal gradation that belongs to different.

For example, under the situation of the point source of light that only uses the same hue grade, must superfluously produce point source of light, in addition,, therefore cause the increase of cost owing to can generate out of use point source of light in order to ensure the point source of light of specified quantity.Therefore, among the present invention, be to be divided in the CIE1931 coordinate, to form to be the tetragonal tonal gradation of coordinate distance 0.01 on one side, and mix the formation of using the point source of light that belongs to different tonal gradations.At this, in the CIE1931 coordinate, form on one side the scope of inequality of representing to discern the tone of point source of light for the tetragonal scope of coordinate distance 0.01.As above, use the point source of light that belongs to different tonal gradations, compare the situation of the point source of light that only uses the same hue grade, can adopt the point source of light of the tonal gradation of wide scope, can help cost cutting through mixing.In addition, mix, can tone averaging as a whole be obtained the roughly illumination light of uniform color tone through the point source of light that makes different tonal gradations.

In addition, above-mentioned a plurality of point source of lights can be disposed on the substrate that forms strip, and aforesaid substrate can be arranged at above-mentioned base.

Under this situation,, compare, can improve operating efficiency 11 situation about being provided with of each point source of light through the substrate that has disposed a plurality of point source of lights is set.

Above-mentioned a plurality of point source of light can be disposed on the straight line along the length direction of aforesaid substrate.

Under this situation, owing to determine the set-up mode of point source of light uniquely according to the set-up mode of substrate, so carry out the design of the configuration of point source of light easily.

Above-mentioned a plurality of point source of light can uniformly-spaced be disposed on 1 aforesaid substrate.

Under this situation, because not according to substrate change point-like configured light sources mode, therefore, even the size of change lighting device also can arbitrarily be used substrate.

Above-mentioned a plurality of point source of light can be along the length direction alignment arrangements multiple row of aforesaid substrate.

According to such formation, can reduce the quantity of the substrate that the quantity of relative point source of light is provided with, can realize reduction, and the raising of operating efficiency of number of components.

Adjacent point source of light in the above-mentioned point source of light can belong to identical above-mentioned tonal gradation or adjacent above-mentioned tonal gradation each other each other on aforesaid substrate.

Under this situation,, therefore, can suppress anisochromatic generation because the tone of adjacent point source of light does not have big difference each other.

In addition, can be, aforesaid substrate disposes a plurality of side by side, this substrate and the adjacent above-mentioned point source of light of column direction belong to each other identical above-mentioned tonal gradation or adjacent above-mentioned tonal gradation.

According to such formation, the also column direction at substrate because the tone of adjacent point source of light does not have big difference each other, therefore can suppress anisochromatic generation.

Can be, aforesaid substrate disposes a plurality of side by side, this substrate and column direction, at the aforesaid substrate that is disposed at the 1st row be disposed between the aforesaid substrate of the 2nd row, the configuration mode of the above-mentioned tonal gradation of above-mentioned point source of light is different.

According to such formation, because the configuration mode of tonal gradation of point source of light is different on the substrate of the substrate of the 1st row and the 2nd row, therefore, for example the problem of the point source of light of the same grade of deflection configuration is difficult for generation, can suppress anisochromatic generation.

Can be, aforesaid substrate disposes a plurality of side by side, this substrate and column direction, adjacent aforesaid substrate is each other with the form setting of 180 degree that reversed along its length direction.

According to such formation, through a kind of substrate of counter-rotating configuration, the configuration mode of the tonal gradation of point source of light is changed, can suppress anisochromatic generation.

Can be that aforesaid substrate disposes a plurality of, adjacent aforesaid substrates along its length direction and connects through connector each other.

According to such formation; Different through preparing multiple for example length, in other words, the substrate that the quantity of the point source of light of configuration is different; Even under size (length) condition of different of lighting device, also can be corresponding with each size through substrate is linked through connector each other.Therefore, need not prepare each substrate, can help cost cutting according to the size of every kind of lighting device.

Can be, above-mentioned connector comprises each other chimeric the 1st connector and the 2nd connector, and at least one side extension is arranged to than the end of the length direction of aforesaid substrate in the outer part in above-mentioned the 1st connector and above-mentioned the 2nd connector.

According to such formation; When adjacent substrate is connected with the 2nd connector through the 1st connector; Because at least one side extends the outside that is arranged to substrate in the 1st connector and the 2nd connector, therefore, can carry out the chimeric of the 1st connector and the 2nd connector sleekly.

Above-mentioned connector can present milky or white.

Under this situation, because the light reflectivity of connector is than higher, therefore, this connector is difficult for absorbing light, can suppress the generation of brightness disproportionation.

Can be, above-mentioned base be rectangular-shaped when overlooking, and aforesaid substrate is with the form configuration consistent with the long side direction of above-mentioned base of its length direction.

According to such formation, compare the short side direction that makes base and the consistent situation of length direction of substrate, the quantity of substrate is reduced.Therefore, because the quantity of the control module of lighting, extinguishing of for example controlling point source of light is reduced, therefore, can realize cost degradation.

Can be that above-mentioned point source of light is a light emitting diode.

Under this situation, can realize long lifetime and low consumption electrification of light source etc.

Can be that above-mentioned point source of light is for carrying out white luminous light emitting diode through the blue-light-emitting chip being coated in the fluorophor that yellow area has a luminescence peak.

In addition, can be that above-mentioned point source of light is for carrying out white luminous light emitting diode through the blue-light-emitting chip being coated in the fluorophor that green and red area have a luminescence peak.

Perhaps, can be that above-mentioned point source of light is for carrying out white luminous light emitting diode through the blue-light-emitting chip being coated in fluorophor and the display predetermined colors in combination chip that green area has a luminescence peak.

And, can be that above-mentioned point source of light is for carrying out white luminous light emitting diode through combined blue, green and emitting red light chip.

Using under such situation of carrying out white luminous light emitting diode, in white since for example partially indigo plant be easy to generate tone variation.Therefore, through using formation of the present invention, can tone equalization as a whole can be obtained the roughly illumination light of uniform color tone.

Can be that above-mentioned point source of light comprises UV-light luminous chip and fluorophor.

Especially can be, above-mentioned point source of light comprise the UV-light luminous chip and blue, green, and red area have the fluorophor of luminescence peak.

In such light source,, through using formation of the present invention, can tone equalization as a whole be obtained the roughly illumination light of uniform color tone though be easy to produce tone variation.

Can be that above-mentioned point source of light electricity is connected in series.

Thus, can the electric current that provide to each point source of light be made as identical, can be with luminous quantity homogenising from each point shape light source, therefore, the brightness uniformity of the illuminated area of this lighting device is improved.

Can be on aforesaid substrate, to be equipped with the diverging lens that can spread from the light of this point source of light with the form that covers above-mentioned point source of light.

Under this situation, owing to, therefore, under the situation that has increased adjacent point source of light interval each other, also be difficult for taking place the lamp shadow picture of point-like through the diverging lens diffused light.Therefore, can realize cost degradation, obtain roughly Luminance Distribution uniformly simultaneously through the point source of light of cutting down configuration.In addition,, can carry out colour mixture, because therefore the look uneven effect that can be reduced, can further realize uniformity of chromaticity to the light of each point source of light through such diverging lens is set.

Can be, but above-mentioned diverging lens be the light pervasion component of diffused light.

Under this situation, can carry out the diffusion of good light through diverging lens.

Can be that above-mentioned diverging lens has been implemented the rough surface processing at the face of aforesaid substrate side.

Like this, handle, can further carry out the diffusion of good light through diverging lens being carried out rough surface such as for example texture processing.

Below, in order to address the above problem, display unit of the present invention is characterised in that, possesses the display floater that above-mentioned lighting device and the light that is used to from this lighting device show.

According to such display unit, can obtain the roughly illumination light of uniform color tone in the lighting device as a whole, therefore, even this display unit also can realize suppressing showing uneven good demonstration.

Can the illustration liquid crystal panel as above-mentioned display floater.Such display unit can be used in various uses as liquid crystal indicator, and for example the display of television set or computer etc. is particularly suitable for using as large-scale picture.

In addition, radiovisor of the present invention is characterised in that and possesses above-mentioned display unit.

According to such radiovisor, can provide not show the uneven good device of visual identity property.

(invention effect)

According to lighting device of the present invention, can obtain as a whole the roughly illumination light of uniform color tone.In addition,, form, therefore can realize suppressing showing uneven good demonstration owing to possess such lighting device according to display unit of the present invention.In addition,, form, therefore, a kind of uneven good device of visual identity property that do not show can be provided owing to possess such display unit according to radiovisor of the present invention.

Description of drawings

Fig. 1 is the exploded perspective view that the summary of the radiovisor of an expression embodiment of the present invention constitutes.

Fig. 2 is the exploded perspective view that the summary of the expression liquid crystal indicator that radiovisor possessed constitutes.

Fig. 3 is the sectional view of expression along the section constitution of the long side direction of liquid crystal indicator.

Fig. 4 is the sectional view of expression along the section constitution of the short side direction of liquid crystal indicator.

Fig. 5 is the plane of configuration mode of the LED substrate of expression base.

Fig. 6 be the expression member that is assemblied in the LED substrate formation want portion's amplification sectional view.

Fig. 7 be the expression member that is assemblied in the LED substrate formation want portion's amplification view.

Fig. 8 is the chromatic diagram of formulating in 1931 of CIE (International Commission on Illumination).

Fig. 9 be presentation graphs 7 tonal gradation division want portion's enlarged drawing.

Figure 10 is the sketch map of configuration mode of LED of each tonal gradation of explanation LED substrate.

Figure 11 is the sketch map of different configuration modes of LED of each tonal gradation of explanation LED substrate.

Figure 12 is the sketch map of another different configuration mode of LED of each tonal gradation of explanation LED substrate.

Figure 13 is the sketch map of another different configuration mode of LED of each tonal gradation of expression LED substrate.

Figure 14 is the sketch map of the different connected mode of explanation LED substrate.

Figure 15 is the sketch map of the different configuration mode of explanation LED.

The specific embodiment

Through Fig. 1 to 10 explanation embodiment of the present invention.

The formation of the radiovisor TV that possesses liquid crystal indicator 10 at first, is described.

As shown in Figure 1, the formation of the radiovisor TV of this embodiment possesses: liquid crystal indicator 10, clip and take in two cabinet Ca, Cb, power supply P, tuner T, pedestal S in the table of this liquid crystal indicator 10.Liquid crystal indicator (display unit) 10 forms grow crosswise square as a whole, is taken in vertical configuration state.As shown in Figure 2, this liquid crystal indicator 10 possesses liquid crystal panel 11 as display floater, as the backlight arrangement (lighting device) 12 of external light source, they are kept by one through housing 13 grades of frame shape.

Below, the liquid crystal panel 11 and the backlight arrangement 12 (with reference to Fig. 2 to Fig. 4) that constitute liquid crystal indicator 10 are described.

Liquid crystal panel (display floater) 11 for make a pair of glass substrate with at interval the state in slit of regulation paste and be incorporated in the formation of enclosing liquid crystal between two glass substrates.(for example on a side glass substrate, be provided with the switch element that is connected with gate wirings with mutually orthogonal source electrode distribution; TFT), the pixel electrode that is connected with this switch element and alignment films etc., on the opposing party's glass substrate, being provided with the regulation alignment arrangements has R (redness), G (green), B (blueness) to wait each colored filter of painted, comparative electrode and alignment films etc.In addition, dispose Polarizer in the outside of two substrates.

As shown in Figure 2, backlight arrangement 12 possess the formation of light emergence face side (liquid crystal panel 11 sides) opening roughly the optical sheet set 15 of the peristome configuration of base 14, the covering base 14 of box (diffuser plate 15a, at a plurality of optical sheet 15b of configuration between diffuser plate 15a and the liquid crystal panel 11), along the outer rim configuration of base 14 and and base 14 between clip and keep the framework 16 of the outer edge of diffuser plate 15a.And, in base 14, dispose light emitting diode (point source of light below is called LED) 17.In addition, in this backlight arrangement 12, comparing diffuser plate 15a side with LED17 becomes the light emitting side.

Base 14 is a metal system; Have with liquid crystal panel 11 be identically formed rectangular-shaped base plate 14a, the side plate 14b that erects from the outer end on each limit of base plate 14a, from the support plate 14c that end stretches out to extroversion that erects of each side plate 14b, form shallow roughly box as a whole to the table side opening.Like Fig. 3 and shown in Figure 4, upload at the support plate 14c of base 14 and to be equipped with framework 16, the reflector plate of after between this support plate 14c and the framework 16 there being clamping, stating 18 and the outer edge of optical sheet set 15.And, on framework 16, be equipped with pilot hole 16a, through screw 19 grades can with housing 13, framework 16, and base 14 etc. integrated.

Peristome side at base 14 is equipped with the optical sheet set 15 that comprises diffuser plate 15a and optical sheet 15b.Diffuser plate 15a disperses to be combined with light diffusing particles in synthetic resin making sheet shape member, has the function of the point-like light that scattering penetrates from the LED17 as point source of light.The outer edge of diffuser plate 15a is carried on the support plate 14c that places base 14 by above-mentioned that kind, does not bear the powerful restraining force of above-below direction.

The optical sheet 15b that on diffuser plate 15a, disposes compares diffuser plate 15a and forms the thin sheet of thickness of slab, with two laminated configuration.The concrete kind of optical sheet 15b for example has diffusion sheet, lens, reflective polaroid etc., can from these, suit to select to use.This optical sheet 15b has the function that the light that penetrates from LED17 and passed through diffuser plate 15a is formed planar light.Upper face side at this optical sheet 15b is provided with liquid crystal panel 11.

On the other hand, in the inner face side of the base plate 14a and the side plate 14b of base 14, be equipped with reflector plate 18 to cover its roughly whole form.Reflector plate 18 is a synthetic resin system, and its surface is made as the good white of light reflective.In this reflector plate 18, with after state diverging lens 21 corresponding positions and form porose 18a.Therefore, though whole by the base plate 14a of reflector plate 18 covering bases 14,, the formation of diverging lens 21 for exposing to optical sheet set 15 sides through the 18a of this hole portion.In addition, reflector plate 18 is the formation that tilts to erect and cover the inner face side of side plate 14b in the edge portion of base plate 14a, and the support plate 14c that places base 14 is carried in its outer edge.Through this reflector plate 18, can make the light that penetrates from LED17 to diffuser plate 15a lateral reflection.

And, be provided with the LED substrate (substrate) 20 that has assembled LED17 and diverging lens 21 in the inner face side of the base plate 14a of base 14.LED substrate 20 is a synthetic resin system, is made as the formation that has formed the Wiring pattern that comprises metal films such as Copper Foil on its surface.As shown in Figure 5, LED substrate 20 is the tabular component of strip, with the form configuration consistent with the long side direction (X-direction) of base 14 of its length direction.More detailed, along the long side direction of base 14,3

LED substrates

20,20,20 are each other with the identical form configuration of its length direction, each other through connector 22 electricity, physical connection.And if observe along the short side direction (Y direction) of base 14,3

LED substrates

20,20,20 that then will be connected in series are configuration 9 row side by side.Be connected with not shown external control unit at these LED substrates 20, provide lighting of LED17 required electric power, can carry out the drive controlling of LED17 simultaneously according to this control module.

The connector 22 that connects adjacent LED substrate 20 is made as the good white of light reflective.Connector 22 comprises the 1st connector 22a that is assemblied in the LED substrate 20 that is positioned at the left side among Fig. 5 relatively, the 2nd connector 22b that is assemblied in the LED substrate 20 that is positioned at the right side relatively.At this, the 1st connector 22a extends and to be arranged to than the end of the length direction of LED substrate 20 in the outer part, finishes

LED substrate

20,20 being connected each other through chimeric the 1st connector 22a and the 2nd connector 22b each other.

On each LED substrate 20,6 LED17 are disposed at (row) on the straight line along the length direction of this LED substrate 20.More detailed, 6 LED17 on each LED substrate 20 with mounted on surface uniformly-spaced.These LED17 are through being coated in the fluorophor that yellow area has a luminescence peak and carrying out white luminous carrying out the luminous blue-light-emitting chip of blue monochromatic.Each LED17 is connected in series through the Wiring pattern electricity that forms at LED substrate 20.In addition, LED17 also can carry out white luminous through for example blue-light-emitting chip being coated in the fluorophor that green and red area have a luminescence peak.In addition, LED17 also can be through being coated in the fluorophor that green area has luminescence peak to the blue-light-emitting chip, simultaneously display predetermined colors in combination chip and carry out white luminous.And, LED17 also can through combined blue, green, and the emitting red light chip carry out white luminous.

And, as shown in Figure 6, be equipped with the roughly spherical diverging lens 21 of semicircle at LED substrate 20 with the form that covers each LED17.Diverging lens 21 is the good light pervasion component of light diffusing, and it is synthetic resin systems such as for example acrylic acid.Circumference below diverging lens 21 is equipped with 3 foots 23.As shown in Figure 7, the surface of LED substrate 20 with roughly uniformly-spaced (about 120 degree at interval) configuration, for example is fixed in along the circumference of diverging lens 21 in 3 foots 23 through bonding agent or heat-curing resin.Below diverging lens 21, overlook for overlapping position is formed with the incident recess 21a of the conical shaped of the state of side depression up, at the light of this incident recess 21a incident with LED17 in (face relative) from LED17 with LED17 and LED substrate 20.Rough surface such as enforcement texture processing is handled below this diverging lens 21.On the other hand, (face relative with diffuser plate 15a) is formed with at central portion (overlook be overlapping position with LED17) the recess 21b of the state of side depression downwards on diverging lens 21, and is formed with the outgoing plane 21c of the continuous form of 2 mild circular arcs.The light that penetrates from LED17 since air layer and incident recess 21a, and outgoing plane 21c and air layer between reflect, thereby by planar diffusion, spread all over wide and shine to diffuser plate 15a side from outgoing plane 21c.

Above-mentioned LED substrate 20 is fixed in the base plate 14a of base 14 through rivet 24.Rivet 24 has discoid press section 24a, the side-prominent downwards fastener 24b of 24a from this press section.Be equipped with the inserting hole 20c that is used for inserting logical fastener 24b at LED substrate 20, in addition, on the base plate 14a of base 14, be equipped with the pilot hole 14d that is communicated with this inserting hole 20c.The leading section of the fastener 24b of rivet 24 is the broad portion of elastically deformable, insert lead to inserting hole 20c and pilot hole 14d after, it can be limited to the rear side of the base plate 14a of base 14.Thus, but rivet 24 limits push LED substrate 20 limits by press section 24a this LED substrate 20 be fixed in base plate 14a.

In addition, as shown in Figure 2, fulcrum post 25 is equipped with on the surface that in rivet 24, is positioned near the rivet 24 the central portion of base plate 14a of base 14.Fulcrum post 25 is the thin taper shape of front end, and at diffuser plate 15a when lateral bending is bent downwards, the front end through this diffuser plate 15a and fulcrum post 25 carries out contacting, and can support diffuser plate 15a from the below.In addition, through controlling this fulcrum post 25, has the function of carrying out the operation of rivet 24 easily.

Above-mentioned to carry out white luminous LED17 be not to be the white of same hue all, in white, has tone uneven (deviation).Therefore, use Fig. 8 and Fig. 9 that the tonal gradation of each LED17 is described below.Fig. 8 is the chromatic diagram that CIE (International Commission on Illumination) 1931 formulates, Fig. 9 be presentation graphs 8 tonal gradation division want portion's enlarged drawing.

Deviation appears in the scope of the use region R of surrounding by solid line of the tone of each LED17 of this embodiment in the CIE1931 of Fig. 8 coordinate.Therefore, as shown in Figure 9, such 3 of tonal gradation A, B, C that this is used region R to be divided into respectively to be surrounded as the quadrangle of coordinate distance 0.01 by each edge lengths.More detailed, the central portion that uses region R is made as tonal gradation A.This tonal gradation A is a tone desired value originally, and maximum LED17 belongs to this grade.In addition, the oblique below of tonal gradation A is made as tonal gradation B, the oblique upper of tonal gradation A is made as tonal gradation C, each tone belongs to this two grade from the LED17 of desired value deviation.Like this, tonal gradation A and tonal gradation B are adjacent tonal gradation, and in addition, tonal gradation A and tonal gradation C also are adjacent tonal gradation.In other words, tonal gradation B and tonal gradation C can be described as non-conterminous tonal gradation.In addition, each the tonal gradation A that is surrounded by the quadrangle of coordinate distance 0.01, B, C are for can not discern anisochromatic scope for the LED17 that belongs in the same tonal gradation.

Then, use Figure 10 that the configuration mode of the tonal gradation of the LED17 that is disposed at LED substrate 20 is described.Figure 10 is the sketch map of configuration mode of LED of each tonal gradation of explanation LED substrate.

Shown in figure 10, the LED17 of different tonal gradation A, B, C is installed on each LED substrate 20.At first, pay close attention to line direction (length direction of the long side direction of X-direction, base 14, LED substrate 20), link 3

LED substrates

20,20,20 are arranged in the 1st connector 22 series connection that worked that are positioned at the top.The tonal gradation of LED substrate 20 LED17 that a left side disposes successively from figure is A, B, A, B, A, C.Therefore, adjacent LED17,17 belongs to adjacent tonal gradation (A and B or A and C) each other in LED substrate 20.

On the other hand, be positioned at the 1st row below the 2nd row, the LED substrate 20 of 3 LED substrates, 20,20,20 relative the 1st row links through connector 22 series connection with the form in the anti-turnback of its length direction.Therefore, the tonal gradation of the LED substrate 20 of the 2nd row LED17 that a left side disposes successively from figure is C, A, B, A, B, A with the opposite sequence of the LED substrate 20 of the 1st row.Like this, adjacent LED17,17 also belongs to adjacent tonal gradation (A and B or A and C) each other in the LED substrate 20 of the 2nd row.And, the 3rd row with the identical configuration direction of the 1st row configuration LED substrate 20, at the 4th row with the configuration direction configuration LED substrate 20 identical with the 2nd row, below so repeatedly arrangement.

And, in X-direction, the

LED substrate

20,20 that links in the 1st row series connection each other, adjacent LED17,17 belongs to adjacent tonal gradation (A and C) each other.In addition,

link LED substrate

20,20 each other in the 2nd row series connection, adjacent LED17,17 also belongs to adjacent tonal gradation (A and C) each other.Like this, all belong to adjacent tonal gradation (A and C) each other at the adjacent LED17 of X-direction, 17.In other words, in X-direction, belonging to the LED17 that separates the tonal gradation (B and C) more than 2 is non-conterminous formation.

In addition; Under the situation of the LED17 of configuration pay close attention to to(for) column direction (short side direction of Y direction, base 14); The tonal gradation of the LED17 of the 1st of left end the row is configured to A, C, A, C... among the figure; The tonal gradation of the 2nd row is configured to B, A, B, A..., and the tonal gradation of the 3rd row is configured to A, B, A, B....Therefore, side by side between the LED substrate 20 of the LED substrate 20 of the 1st of configuration the row and the 2nd row, i.e. column direction (Y direction), adjacent LED17,17 also belongs to adjacent tonal gradation (A and B or A and C) each other.In other words, in Y direction, belong to the LED17 that separates the tonal gradation (B and C) more than 2 and also be non-conterminous formation.

In addition, in this embodiment, the LED substrate 20 of the LED substrate 20 of the 1st row right-hand member and the 2nd row right-hand member is electrically connected through distribution 26.Thus, through LED substrate 20 input driving electric, can each LED17 on the LED substrate 20 that reach the 2nd row on the LED substrate 20 of the 1st row be lighted with 1 control module from the 1st row left end.

As described above, according to this embodiment, in base 14, taken in LED17, this LED17 is divided respectively in the CIE1931 coordinate, forming according to tone is tetragonal 3 tonal gradation A, B, the C of coordinate distance 0.01 on one side.

For example, under the situation of the LED17 that only uses same tonal gradation,, must superfluously produce LED17, in addition,, therefore cause the increase of cost owing to can produce out of use LED17 in order to ensure the LED17 of stated number.But, like this embodiment, use the LED17 that belongs to different tonal gradation A, B, C through mixing, compare the situation of the LED17 that only uses same tonal gradation, can adopt the LED17 of the tonal gradation of wide scope, help cost cutting.In addition, mix, can tone integral planar homogenizing be obtained the roughly illumination light of the tone of homogeneous through the LED17 that makes the tonal gradation A that belongs to different, B, C.

In addition, in this embodiment, a plurality of LED17 are disposed at the LED substrate 20 that forms strip, and this LED substrate 20 is arranged at base 14.Under this situation, compare each LED17, operating efficiency is improved by 11 situation that is arranged at base 14.

In addition, a plurality of LED17 are owing to be disposed on the straight line along the length direction of LED substrate 20, and owing to determine uniquely the set-up mode of LED17 therefore, to carry out the design of the configuration of this LED17 easily according to the set-up mode of LED substrate 20.

In addition, a plurality of LED17 equidistantly are disposed on 1 LED substrate.Therefore, owing to, therefore, also can arbitrarily use LED substrate 20 even change the size of this backlight arrangement 12 not according to the configuration mode of LED substrate 20 change LED17.

In addition, LED17 belongs to adjacent each other tonal gradation A and the formation of tonal gradation B or tonal gradation A and tonal gradation C each other on LED substrate 20 for it is adjacent.Therefore, because the tone of adjacent LED17 does not have big difference, therefore, can suppress anisochromatic generation.

In addition, LED substrate 20 configuration side by side is a plurality of, this LED substrate 20 and the adjacent LED17 of column direction be the tonal gradation A that belongs to adjacent each other and the formation of tonal gradation B or tonal gradation A and tonal gradation C.According to such formation, the also column direction at LED substrate 20 because the tone of adjacent LED17 does not have big difference each other, therefore can suppress anisochromatic generation.

In addition, LED substrate 20 and column direction,

adjacent LED substrate

20,20 is each other with the form setting of 180 degree that reversed along its length direction.According to such formation, through a kind of LED substrate 20 of counter-rotating configuration, the configuration mode of the tonal gradation of LED17 is changed, can suppress anisochromatic generation.

In addition, LED substrate 20 is a plurality of along its length direction configuration, and

adjacent LED substrate

20,20 connects through connector 22 each other.

According to such formation; For example length is different to have prepared several in advance; In other words; The LED substrate 20 that the quantity of the LED17 that is disposed is different, even under the size condition of different of backlight arrangement 12, also can be corresponding with each size through

LED substrate

20,20 being utilized each other connector 22 link.Therefore, can not need prepare LED substrate 20 respectively, help cost cutting according to the size of every kind of backlight arrangement 12.

In addition, in this embodiment, connector 22 comprises the 1st connector 22a and the 2nd connector 22b, and the 1st connector 22a extends and to be arranged to than the end of the length direction of LED substrate 20 in the outer part.

According to such formation; When

adjacent LED substrate

20,20 is connected with the 2nd connector 22b through the 1st connector 22a; At least one side extends the outside that is arranged to LED substrate 20 among the 1st connector 22a and the 2nd connector 22b; Therefore, can carry out the chimeric of the 1st connector 22a and the 2nd connector 22b sleekly.

In addition, connector 22 presents white.

Under this situation, the light reflectivity of connector 22 is than higher, and therefore, connector 22 is difficult for absorbing light, can suppress the generation of brightness disproportionation.

In addition, base 14 is rectangular-shaped when overlooking, and LED substrate 20 is with the form configuration consistent with the long side direction of base 14 of its length direction.

According to such formation, compare the short side direction situation consistent that makes base 14 with the length direction of LED substrate 20, can reduce the quantity of LED substrate 20.Therefore, owing to can reduce the quantity of the control module of lighting, extinguishing of for example controlling LED17, therefore, can realize cost degradation.

In addition, owing to adopt LED17, therefore, can realize long lifetime and the low consumption electrification of light source etc. as light source.

Particularly, in this embodiment, adopt as light source the blue-light-emitting chip is carried out white luminous LED17 through the fluorophor that is coated in yellow area and has a luminescence peak.

Using under such situation of carrying out white luminous LED17,, therefore be easy to produce tone variation because the formation condition (concentration, thickness etc.) of fluorophor is blue or green partially in white.Therefore, through being suitable for formation of the present invention, can tone equalization as a whole be obtained the roughly illumination light of uniform color tone.

In addition, a plurality of LED17 electricity are connected in series.

Thus, can make the electric current that provides to each LED17 identical, can therefore, the brightness uniformity of the illuminated area of this backlight arrangement 12 improved luminous quantity homogenising from each LED17.

In addition, be equipped with the diverging lens 21 that can spread with the form that covers LED17 from the light of this LED17.Under this situation, owing to, therefore,, also be difficult for taking place the lamp shadow picture of point-like even under the situation that increases adjacent LED17,17 interval each other through diverging lens 21 diffused lights.Therefore, can realize cost degradation through the LED17 limit of cutting down configuration, the limit obtains roughly Luminance Distribution uniformly.In addition, through such diverging lens 21 is set, can be with the light colour mixture of each LED17, therefore the look uneven effect that can be reduced, can further realize uniformity of chromaticity.

In addition, but diverging lens 21 is the light pervasion component of diffused light, therefore, can carry out the diffusion of good light.

In addition, diverging lens 21 has been implemented the rough surface processing at the face of LED substrate 20 sides, therefore, can further carry out the diffusion of good light.

More than show embodiment of the present invention, but the invention is not restricted to above-mentioned embodiment, for example, can adopt the various variation shown in following.In addition, in each following variation, for mark and the omission explanation together of the inscape identical, member of formation additional phase with above-mentioned embodiment.

[the 1st variation]

Variation as the configuration mode of LED17 adopts mode shown in Figure 11.Figure 11 is the sketch map of different configuration modes of LED of each tonal gradation of explanation LED substrate.

Among Figure 11, pay close attention to X-direction (length direction of line direction, LED substrate 20), be in the 1st row of the top, 3

LED substrates

20,20,20 are through connector 22 electricity, physically connection.The tonal gradation of LED substrate 20 LED17 that a left side disposes successively from figure is A, B, A, B, A, C.Therefore, adjacent LED17,17 belongs to adjacent tonal gradation (A and B or A and C) each other in LED substrate 20.And, the 2nd row, the 3rd row, the 4th row ... in, also link 3 LED substrates 20 with the configuration direction series connection identical with the 1st row.Therefore, pay close attention to Y direction (the also column direction of LED substrate 20), the LED17 tonal gradation of the 1st of left end the row is A, A, A, A... among the figure, and the tonal gradation of the 2nd row is B, B, B, B....That is, side by side the LED substrate 20 of configuration and the adjacent LED17,17 of column direction belong to identical tone (A and A or B and B or C and C) each other.

According to such formation, adjacent LED17,17 tone do not have big difference each other, can suppress anisochromatic generation.Particularly, owing to can reduce the kind of the LED substrate 20 of preparation, therefore can help cost cutting in this example.

[the 2nd variation]

Variation as the configuration mode of LED17 can adopt mode shown in Figure 12.Figure 12 is the sketch map of another different configuration mode of LED of each tonal gradation of explanation LED substrate.

Among Figure 12, pay close attention to X-direction (length direction of line direction,

LED substrate

20d, 20e),, 3

1LED substrate

20d, 20d, 20d are passed through connector 22 electricity, physical connection being in the 1st row of the top.In 1LED substrate 20d, the tonal gradation that a left side sets gradually to LED17 from figure is A, B, A, A, A, C.Therefore, adjacent LED17,17 belongs to same hue grade (A and A) or adjacent tonal gradation (A and B or A and C) each other among the 1LED substrate 20d.In addition, at the 2nd row, 3

2LED substrate

20e, 20e, 20e pass through connector 22 electricity, physical connection.The tonal gradation of the 2LED substrate 20e LED17 that a left side disposes successively from figure is B, A, A, A, C, A.Therefore, adjacent LED17,17 also belongs to same hue grade (A and A) or adjacent tonal gradation (A and B or A and C) each other on 2LED substrate 20e.

Like this, in this example, LED substrate (1LED20d, 2LED substrate 20e) and column direction, at the 1LED substrate 20d that is disposed at the 1st row be disposed between the 2LED substrate 20e of the 2nd row, the configuration mode of the tonal gradation of LED17 is different.

According to such formation,

LED substrate

20d, 20e and the adjacent LED17 of column direction (line direction), 17 the mutual difference of tone little, therefore can suppress anisochromatic generation.Particularly, this routine formation is applicable to the significantly many situation of quantity of comparing the LED17 that belongs to other tonal gradation B, C as the quantity of the LED17 of the tonal gradation A of the desired value of tone that belong to.

[the 3rd variation]

Variation as the configuration mode of LED17 can adopt mode shown in Figure 13.Figure 13 is the sketch map of another different configuration mode of LED of each tonal gradation of explanation LED substrate.

Among Figure 13, pay close attention to X-direction (length direction of line direction, LED substrate 20f, 20g), be positioned at the 1st row of the top, 3 3LED substrate 20f, 20f, 20f pass through connector 22 electricity, physical connection.The tonal gradation of the 3LED substrate 20f LED17 that a left side disposes successively from figure is A, C, A, C, A, C.Therefore, adjacent LED17,17 belongs to adjacent tonal gradation (A and C) each other in 3LED substrate 20f.In addition, at the 2nd row, 3 4LED substrate 20g, 20g, 20g pass through connector 22 electricity, physical connection.The tonal gradation of the LED17 that a left side disposes successively from figure on 4LED substrate 20g is B, A, B, A, B, A.Therefore, adjacent LED17,17 belongs to adjacent tonal gradation (A and B) each other among the 4LED substrate 20g.

In addition, pay close attention at relevant column direction (Y direction) under the situation of configuration of LED17, form following formation; Promptly; The tonal gradation of LED17 of the 1st of left end the row is A, B, A, B... among the figure, and the tonal gradation of the 2nd row is C, A, C, A..., below identical repeatedly arrangement.Therefore, even between the 3LED substrate 20f and 4LED substrate 20g of configuration side by side, that is, in column direction (Y direction), adjacent LED17,17 also belongs to adjacent tonal gradation (A and B or A and C) each other.

According to such formation, there is not big difference each other at the adjacent LED17 of column direction and line direction, 17 tone, therefore, can suppress anisochromatic generation.

[the 4th variation]

Variation as the connected mode of LED substrate 20 can adopt mode shown in Figure 14.Figure 14 is the sketch map of the different connected mode of explanation LED substrate.

Among Figure 14, be positioned at the 1st row of the top, 3

LED substrates

20,20,20 are through connector 22 electricity, physical connection.In addition, at the 2nd row, the LED substrate 20 of 3

LED substrate

20,20,20 relative the 1st row links through connector 22 series connection with the form of 180 degree that reversed along its length direction.At this, in this example, the LED substrate 20 of the LED substrate 20 of the 1st row and the 2nd row is not connected through for example distribution etc., and the formation electricity independently constitutes.That is, in each row, form the formation of the driving electric of the LED substrate 20 input LED17 of left end in figure respectively.

According to such formation, can be according to each row drive LED17 such as the 1st row, the 2nd row.

[the 5th variation]

As the different variation of the configuration mode of LED17, can adopt mode shown in Figure 15.Figure 15 is the sketch map of the different configuration mode of explanation LED.

Shown in figure 15, pay close attention to X-direction (length direction of line direction, LED substrate 20h), 3 5LED substrate 20h are through connector 22 electricity, physical connection.In 5LED substrate 20h, LED17 arranges 2 row in Y direction (width of LED substrate 20h), and electricity is connected in series.The 1st row tonal gradation that a left side sets gradually to LED17 from figure of 5LED substrate 20h is A, B, A, B, A, B.Therefore, adjacent LED17,17 belongs to adjacent tonal gradation (A and B) each other in the 1st row of 5LED substrate 20h.In addition, the 2nd of 5LED substrate 20h the row tonal gradation that a left side sets gradually to LED17 from figure is C, A, C, A, C, A.Therefore, adjacent LED17,17 belongs to adjacent tonal gradation (A and C) each other in the 2nd row of 5LED substrate 20h.

In addition, pay close attention to the Y direction (width of column direction, LED substrate 20h) of 5LED substrate 20h, adjacent LED17, the configuration side by side of 17 electricity.At this, to be set to tonal gradation be A, C to the LED17 of the 1st of left end the row among the figure, and it is B, A that the 2nd row are set to tonal gradation.Therefore, even in column direction (Y direction), adjacent LED17,17 also belongs to adjacent tonal gradation (A and B or A and C) each other.

According to this example; LED17 is by the length direction alignment arrangements multiple row (is 2 row at this) along 5LED substrate 20h; Therefore, the quantity of the LED substrate 20 (5LED substrate 20h) that the quantity of relative LED17 is provided with can be reduced, reduction, and the raising of operating efficiency of number of components can be realized.

< other embodiment >

More than show embodiment of the present invention, but the invention is not restricted to the embodiment according to above-mentioned record and description of drawings, for example following embodiment also is contained in technical scope of the present invention.

(1) in the above-mentioned embodiment illustration tonal gradation is divided the situation for 3, but the number of partitions of tonal gradation is not limited thereto, situation about being divided into more than 2 or 4 also is contained in the present invention.

(2) in the above-mentioned embodiment, illustration linked the formation of 3 LED substrates at the long side direction (X-direction) of base, the quantity of LED substrate also can be below 2, or also can be more than 4.In addition, the quantity that is disposed at the LED of 1 LED substrate also is not limited to 6, can be quantity arbitrarily.

(3) in the above-mentioned embodiment, be made as long side direction (X-direction) and will have the formation that LED substrate that the tone of identical LED arranges links each other, but also can be made as having the formation that LED substrate that different tones arranges links each other at base.

(4) in the above-mentioned embodiment, illustration carry out white luminous LED, but color development light is not limited to white, can be random color.

(5) in the above-mentioned embodiment; Illustration each LED is configured to cancellate formation along direction permutation in length and breadth, but for example also can each LED be configured to the closeest shape of six sides, promptly; The mode impartial fully with the distance between the adjacent LED disposes, or each LED is interconnected.

(6) in the above-mentioned embodiment; As the light source illustration carry out white luminous LED through the blue-light-emitting chip being coated in the fluorophor that yellow area has a luminescence peak; But, also can be made as by near the UV-light luminous chip that for example wavelength 380nm, has luminescence peak with absorb this ultraviolet light and send the light source that the fluorophor of fluorescence constitutes.At this moment, as fluorophor,, can obtain white light through using at fluorophor blue, green, that zone that reach redness has luminescence peak.The white light that constitutes like this spreads all over broad visible light scope can obtain mild spectrum, and colour rendering is good.At this, because the deviation of the sendout of fluorophor etc. produce the look inequality sometimes, but can carry out the homogenising of tone according to formation of the present invention.Thus, it is good and suppressed look uneven lighting device to obtain colour rendering.

(7) in the above-mentioned embodiment, illustration with the formation of the form configuration diverging lens that covers LED, but not necessarily must the configuration diverging lens.Under this situation, through intensive configuration LED, the generation of suppressible point shape lamp shadow picture.

(8) in the above-mentioned embodiment, illustration use the example of LED as point source of light, but also can use the point source of light beyond the LED.

(9) in the above-mentioned embodiment, as the optical sheet set illustration formation of combination diffuser plate, diffusion sheet, lens, reflective polaroid, but for example also can adopt 2 formations that diffuser plate is range upon range of as optical sheet.

(10) in the above-mentioned embodiment, connector adopts the connector present white, but so long as the good connector of light reflective is just passable, also can form by for example presenting milky material.

Description of reference numerals

10... liquid crystal indicator (display unit); 11... liquid crystal panel (display floater); 12... backlight arrangement (lighting device); 14... base; (17...LED point source of light, light emitting diode); 20...LED substrate (substrate); 21... diverging lens; 22... connector; 22a... the 1st connector; 22b... the 2nd connector; A, B, C... tonal gradation; TV... radiovisor.

Claims

1. lighting device is characterized in that possessing:

A plurality of point source of lights; And

Take in the base of above-mentioned point source of light,

Each above-mentioned point source of light is divided into respectively in the CIE1931 coordinate, to form according to its tone and is the tetragonal tonal gradation more than 2 of coordinate distance 0.01 on one side,

In above-mentioned base, take in the above-mentioned point source of light of the above-mentioned tonal gradation that belongs to different.

2. lighting device according to claim 1 is characterized in that,

Above-mentioned a plurality of point source of light is disposed at the substrate that forms strip,

Aforesaid substrate is arranged at above-mentioned base.

3. lighting device according to claim 2 is characterized in that,

Above-mentioned a plurality of point source of light is disposed on the straight line along the length direction of aforesaid substrate.

4. according to claim 2 or the described lighting device of claim 3, it is characterized in that,

Above-mentioned a plurality of point source of light is uniformly-spaced to be disposed on 1 aforesaid substrate.

5. according to each described lighting device in claim 2 to the claim 4, it is characterized in that,

Above-mentioned a plurality of point source of light has multiple row along the length direction alignment arrangements of aforesaid substrate.

6. according to each described lighting device in claim 2 to the claim 5, it is characterized in that,

Adjacent point source of light in the above-mentioned point source of light belongs to identical above-mentioned tonal gradation or adjacent above-mentioned tonal gradation each other each other on aforesaid substrate.

7. according to each described lighting device in claim 2 to the claim 6, it is characterized in that,

Aforesaid substrate disposes a plurality of side by side, this substrate and the adjacent above-mentioned point source of light of column direction belong to each other identical above-mentioned tonal gradation or adjacent above-mentioned tonal gradation.

8. according to each described lighting device in claim 2 to the claim 7, it is characterized in that,

Aforesaid substrate disposes a plurality of side by side, this substrate and column direction, at the aforesaid substrate that is disposed at the 1st row be disposed between the aforesaid substrate of the 2nd row, the configuration mode of the above-mentioned tonal gradation of above-mentioned point source of light is different.

9. according to each described lighting device in claim 2 to the claim 8, it is characterized in that,

Aforesaid substrate disposes a plurality of side by side, and at the also column direction of this substrate, adjacent aforesaid substrate disposes with the form of 180 degree that reversed at its length direction each other.

10. according to each described lighting device in claim 2 to the claim 9, it is characterized in that,

Aforesaid substrate disposes a plurality of along its length direction,

Adjacent aforesaid substrate connects through connector each other.

11. lighting device according to claim 10 is characterized in that,

Above-mentioned connector comprises chimeric the 1st connector and the 2nd connector each other,

At least one side extends and is arranged to than the end of the length direction of aforesaid substrate in the outer part in above-mentioned the 1st connector and above-mentioned the 2nd connector.

12. according to claim 10 or the described lighting device of claim 11, it is characterized in that,

Above-mentioned connector presents milky or white.

13. according to each described lighting device in claim 2 to the claim 12, it is characterized in that,

Above-mentioned base is rectangular-shaped when overlooking,

Aforesaid substrate is with the form configuration consistent with the long side direction of above-mentioned base of its length direction.

14. according to each described lighting device in claim 1 to the claim 13, it is characterized in that,

Above-mentioned point source of light is a light emitting diode.

15. according to each described lighting device in claim 1 to the claim 14, it is characterized in that,

Above-mentioned point source of light is for carrying out white luminous light emitting diode through the blue-light-emitting chip being coated in the fluorophor that yellow area has a luminescence peak.

16. according to each described lighting device in the claim 1 to 14, it is characterized in that,

Above-mentioned point source of light is for carrying out white luminous light emitting diode through the blue-light-emitting chip being coated in the fluorophor that green and red area have a luminescence peak.

17. according to each described lighting device in claim 1 to the claim 14, it is characterized in that,

Above-mentioned point source of light is for carrying out white luminous light emitting diode through the blue-light-emitting chip being coated in fluorophor and the display predetermined colors in combination chip that green area has a luminescence peak.

18. according to each described lighting device in claim 1 to the claim 14, it is characterized in that,

Above-mentioned point source of light is for carrying out white luminous light emitting diode through combined blue, green and emitting red light chip.

19. according to each described lighting device in claim 1 to the claim 14, it is characterized in that,

Above-mentioned point source of light comprises UV-light luminous chip and fluorophor.

20. according to each described lighting device in claim 1 to the claim 14, it is characterized in that,

Above-mentioned point source of light comprises the UV-light luminous chip and has the fluorophor of luminescence peak at blue, green and red area.

21. according to each described lighting device in claim 1 to the claim 20, it is characterized in that,

Above-mentioned point source of light electricity is connected in series.

22. according to each described lighting device in claim 1 to the claim 21, it is characterized in that,

On aforesaid substrate, be equipped with the diverging lens that can spread from the light of this point source of light with the form that covers above-mentioned point source of light.

23. lighting device according to claim 22 is characterized in that,

But above-mentioned diverging lens is the light pervasion component of diffused light.

24. according to claim 22 or 23 described lighting devices, it is characterized in that,

Above-mentioned diverging lens has been implemented the rough surface processing at the face of aforesaid substrate side.

25. a lighting device is characterized in that possessing:

A plurality of point source of lights; And

Take in the base of above-mentioned point source of light,

Each above-mentioned point source of light is divided into respectively in the CIE1931 coordinate, to form according to its tone and is the tetragonal tonal gradation more than 2 of regulation coordinate distance on one side,

In above-mentioned base, take in the above-mentioned point source of light of the above-mentioned tonal gradation that belongs to different,

Aforesaid substrate is arranged at above-mentioned base,

Adjacent point source of light in the above-mentioned point source of light belongs to each other identical above-mentioned tonal gradation or adjacent above-mentioned tonal gradation each other on aforesaid substrate.

26. a lighting device is characterized in that possessing:

A plurality of point source of lights; And

Take in the base of above-mentioned point source of light,

Aforesaid substrate is arranged at above-mentioned base,

Aforesaid substrate disposes a plurality of side by side, this substrate and column direction on adjacent above-mentioned point source of light belong to each other identical above-mentioned tonal gradation or adjacent above-mentioned tonal gradation.

27. a lighting device is characterized in that possessing:

A plurality of point source of lights; And

Take in the base of above-mentioned point source of light,

Aforesaid substrate is arranged at above-mentioned base,

28. a lighting device is characterized in that possessing:

A plurality of point source of lights; And

Take in the base of above-mentioned point source of light,

Aforesaid substrate is arranged at above-mentioned base,

Aforesaid substrate disposes a plurality of side by side, this substrate and column direction, adjacent aforesaid substrate is each other with the form setting of 180 degree that reversed along its length direction.

29. a display unit is characterized in that possessing:

Each described lighting device in claim 1 to the claim 28; And

Be used to the display floater that the light from above-mentioned lighting device shows.

30. display unit according to claim 29 is characterized in that,

Above-mentioned display floater is the liquid crystal panel that has used liquid crystal.

31. a radiovisor is characterized in that,

Possesses the described display unit of claim 29 or claim 30.